diff options
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/m68k/m68k.h | 6 |
2 files changed, 11 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 778b934d2f3..ff9a8dcc6a5 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Wed Mar 6 12:27:10 2002 Jeffrey A Law (law@redhat.com) + + * m68k.h (CONST_COSTS): Lower cost of 0.0 when used inside a + COMPARE operator. + 2002-03-06 Phil Edwards <pme@gcc.gnu.org> * version.c: Fix misplaced leading blanks on first line. diff --git a/gcc/config/m68k/m68k.h b/gcc/config/m68k/m68k.h index 1f21ba96bac..9d89fe74d03 100644 --- a/gcc/config/m68k/m68k.h +++ b/gcc/config/m68k/m68k.h @@ -1555,6 +1555,12 @@ __transfer_from_trampoline () \ case SYMBOL_REF: \ return 3; \ case CONST_DOUBLE: \ + /* Make 0.0 cheaper than other floating constants to \ + encourage creating tstsf and tstdf insns. */ \ + if ((OUTER_CODE) == COMPARE \ + && ((RTX) == CONST0_RTX (SFmode) \ + || (RTX) == CONST0_RTX (DFmode))) \ + return 4; \ return 5; /* Compute the cost of various arithmetic operations. |
